SIMULADOR 5 EXAMEN LICENCIA TLA SOLO SISTEMAS ELECTRICOS (INGLES)

Question 1 of 150

1

A series-wound dc electric motor will normally require

Select one of the following:

"more current at high RPM than at low RPM."
approximately the same current throughout its operating range of speed.
"more current at low RPM than at high RPM."
high resistance will develop in stripping nicks.

Explanation

Question 2 of 150

1

A voltage regulator controls generator output by

Select one of the following:

"introducing a resistance in generator-to-battery lead in the event of overload."
shorting out field coil in the event of overload.
Series wound.
varying current flow to generator field coil.

Explanation

Question 3 of 150

1

Aluminum wire must be stripped very carefully because

Select one of the following:

high resistance will develop in stripping nicks.
stripping nicks can cause short circuits.
individual strands will break easily after being nicked.
to prevent circuit failure due to terminal disconnection.

Explanation

Question 4 of 150

1

An ammeter in a battery charging system is for the purpose of indicating the

Select one of the following:

amperage available for use.
total amperes being used in the airplane.
rate of current used to charge the battery.
stripping nicks can cause short circuits.

Explanation

Question 5 of 150

1

For general electrical use in aircraft, the acceptable method of attaching a terminal to a wire is by

Select one of the following:

crimping.
soldering.
crimping and soldering.
Rolling

Explanation

Question 6 of 150

1

How can it be determined if a transformer winding has some of its turns shorted together?

Select one of the following:

Measure the input voltage with an ohmmeter.
The output voltage will be high.
The transformer will get hot in normal operation.
A high internal resistance condition.

Explanation

Question 7 of 150

1

How does the magnetic brake used to stop rotation of an electric motor armature operate?

Select one of the following:

"Centrifugal force releases a rotating brake cog from a stationary notch when the armature reaches a certain speed and magnetic force re-engages the cog when the electrical power is turned off."
A friction brake is applied by a magnet and released by a spring.
approximately the same current throughout its operating range of speed.
A friction brake is applied by a spring and released by a magnet.

Explanation

Question 8 of 150

1

"How many cycles of ac voltage are produced in a six-pole alternator of the revolving-field type
for each revolution of the rotor?"

Select one of the following:

Four.
Three.
Six.
Two

Explanation

Question 9 of 150

1

If a generator is equipped with a vibrator-type voltage regulator, the actual time the voltage regulator points remain open

Select one of the following:

depends on the load carried by the generator.
is controlled by the reverse-current cutout relay point clearance.
is increased when the external load is greater than the generator output.
motor can be operated in either direction.

Explanation

Question 10 of 150

1

"If the reverse current cutout relay contact points fail to open after the generator output has dropped below battery potential, current will flow through the generator armature"

Select one of the following:

"in the normal direction and through the shunt field opposite the normal direction."
and the shunt field opposite the normal direction.
"Centrifugal force releases a rotating brake cog from a stationary notch when the armature reaches a certain speed and magnetic force re-engages the cog when the electrical power is turned off."
opposite the normal direction and through the shunt field in the normal direction.

Explanation

Question 11 of 150

1

One purpose of a growler test is to determine the presence of

Select one of the following:

an out-of-round commutator.
a broken field lead.
a shorted armature.
power output of the motor can be more closely controlled.

Explanation

Question 12 of 150

1

The commutator of a generator

Select one of the following:

changes direct current produced in the armature into alternating current as it is taken from the armature.
changes alternating current produced in the armature into direct current as it is taken from the armature.
"reverses the current in the field coils at the proper time in order to produce direct current."
total amperes being used in the airplane.

Explanation

Question 13 of 150

1

The method most often used in overcoming the effect of armature reaction is through the use of

Select one of the following:

interpoles.
shaded poles.
drum-wound armatures in combination with a negatively connected series field.
opposite the normal direction and through the shunt field in the normal direction.

Explanation

Question 14 of 150

1

The only practical method of maintaining a constant voltage output from an aircraft generator under varying conditions of speed and load is to vary the

Select one of the following:

strength of the magnetic field.
number of conductors in the armature.
speed at which the armature rotates.
amperes and frequency must both be equal.

Explanation

Question 15 of 150

1

The pole pieces or shoes used in a dc generator are a part of the

Select one of the following:

armature assembly.
field assembly.
brush assembly.
Inverter drive motor.

Explanation

Question 16 of 150

1

The starting current of a series-wound dc motor, in passing through both the field and armature windings, produces a

Select one of the following:

low starting torque.
speed slightly higher when unloaded.
high starting torque.
Starter motor.

Explanation

Question 17 of 150

1

The type of electric wire terminals used for most aircraft applications, in addition to providing good current carrying capabilities, are designed primarily

Select one of the following:

to prevent circuit failure due to terminal disconnection.
for uncomplicated and rapid circuit connection and disconnection.
for permanent connection to the circuit.
Reduce field strength.

Explanation

Question 18 of 150

1

To test generator or motor armature windings for opens,

Select one of the following:

"place armature in a growler and connect a 110V test light on adjacent segments; light should light."
check adjacent segments on commutator with an ohmmeter on the high resistance scale.
use a 12/24V test light between the armature core segments and the shaft.
rate of current used to charge the battery.

Explanation

Question 19 of 150

1

To what depth is the mica insulation between the commutator bars of a dc generator undercut?

Select one of the following:

One-half the width of the mica.
Equal to twice the width of the mica.
Equal to the width of the mica.
Three-half the width of the mica.

Explanation

Question 20 of 150

1

What is a cause of generator brush arcing?

Select one of the following:

"Seating brushes with No. 000 sandpaper.
"Carbon dust particles.
Low spring tension.
amperes and voltage must both be equal.

Explanation

Question 21 of 150

1

What is the color and orientation of the position lights for navigation on civil airplanes?

Select one of the following:

Left side - green, right side - red, rear aft - white.
Left side - red, right side - green, rear aft - white.
"Left side - white, right side - green, rear aft - red."
Left side - White, right side - red, rear aft - white.

Explanation

Question 22 of 150

1

What is the minimum bend radius for an electrical wire bundle?

Select one of the following:

Forty times the outside diameter of the bundle.
Five times the outside diameter of the bundle.
Fifteen times the outside diameter of the bundle.
Ten times the outside diameter of the bundle.

Explanation

Question 23 of 150

1

What is the most accurate type of frequency- measuring instrument?

Select one of the following:

Integrated circuit chip having a clock circuit.
Electrodynamometers using electromagnetic fields.
Electromagnets using one permanent magnet.
checked with a milliamp ammeter.

Explanation

Question 24 of 150

1

What is the principal advantage of the series- wound dc motor?

Select one of the following:

High starting torque.
Suitable for constant speed use.
Low starting torque.
speed of the motor can be more closely controlled.

Explanation

Question 25 of 150

1

When ac generators are operated in parallel, the

Select one of the following:

amperes and frequency must both be equal.
frequency and voltage must both be equal.
amperes and voltage must both be equal.
shaded poles.

Explanation

Question 26 of 150

1

When approved, splices may be used to repair manufactured harnesses or installed wiring. The maximum number of splices permitted between any two connectors is

Select one of the following:

Four
two.
three.
one.

Explanation

Question 27 of 150

1

Which motor would be most likely to have an armature brake?

Select one of the following:

Starter motor.
Landing light retraction motor.
Inverter drive motor.
field assembly.

Explanation

Question 28 of 150

1

Which of the following is most likely to cause thermal runaway in a nickel-cadmium battery?

Select one of the following:

A high internal resistance condition.
Excessive current draw from the battery.
"Constant current charging of the battery to more than 100 percent of its capacity."
has at least a residual charge before removing it from the circuit.

Explanation

Question 29 of 150

1

Which type of dc generator is not used as an airplane generator?

Select one of the following:

Externally grounded.
Series wound.
Compound wound.
Shunt-type ohmmeter.

Explanation

Question 30 of 150

1

Electric wire terminals for most aircraft applications must be what type?

Select one of the following:

Slotted.
Hook.
Ring.
Tappered

Explanation

Question 31 of 150

1

How should the splices be arranged if several are to be located in an electrical wire bundle?

Select one of the following:

Staggered along the length of the bundle.
Grouped together to facilitate inspection.
Enclosed in a conduit.
soldering.

Explanation

Question 32 of 150

1

In a generator, what eliminates any possible sparking to the brush guides caused by the movement of the brushes within the holder?

Select one of the following:

The brush pigtail.
Brush spring tension.
Undercutting the mica on the commutator.
A friction brake is applied by a magnet and released by a spring.

Explanation

Question 33 of 150

1

Some electric motors have two sets of field windings wound in opposite directions so that the

Select one of the following:

speed of the motor can be more closely controlled.
power output of the motor can be more closely controlled.
motor can be operated in either direction.
a broken field lead.

Explanation

Question 34 of 150

1

What type of instrument is used for measuring very high values of resistance?

Select one of the following:

Megohmmeter.
Shunt-type ohmmeter.
Multimeter.
"introducing a resistance in generator-to-battery lead in the event of overload."

Explanation

Question 35 of 150

1

When a diode is checked for an open circuit or a short circuit, it should be

Select one of the following:

in the circuit.
disconnected from the circuit.
Electromagnets using one permanent magnet.
checked with a milliamp ammeter.

Explanation

Question 36 of 150

1

When handling a high voltage capacitor in an electrical circuit, be sure it

Select one of the following:

has a full charge before removing it from the circuit.
has at least a residual charge before removing it from the circuit.
is fully discharged before removing it from the circuit.
Excessive current draw from the battery.

Explanation

Question 37 of 150

1

Which of the following is not one of the purposes of interpoles in a generator?

Select one of the following:

Reduce field strength.
Overcome armature reaction.
Reduce arcing at the brushes.
stripping nicks can cause short circuits.

Explanation

Question 38 of 150

1

¿Que actividades realiza el relé de protección diferencial?

Select one of the following:

Abre el relé de generador y cierra el relé de cruce
Abre el relé de cruce y cierra el relé de generador
Compara el voltaje que sale del generador con el voltaje que llega al punto de distribución
Compara la corriente que sale del generador con la corriente que llega al punto de distribución

Explanation

Question 39 of 150

1

A battery-generator system provides direct current. On installations requiring alternating current from the battery-generator system, it is necessary to have

Select one of the following:

a transformer.
a magnetically operated switch.
a variable resistor between the battery and generator.
an inverter.

Explanation

Question 40 of 150

1

A certain switch is described as a single-pole, double-throw switch (SPDT). The throw of a switch indicates the number of

Select one of the following:

circuits each pole can complete through the switch.
places at which the operating device (toggle, plunger, etc.) will come to rest and at the same time open or close a circuit.
terminals at which current can enter or leave the switch.
are useful where only temporary overloads are normally encountered.

Explanation

Question 41 of 150

1

A circuit breaker is installed in an aircraft electrical system primarily to protect the

Select one of the following:

circuit and should be located as close to the source as possible.
circuit and should be located as close to the unit as possible.
electrical unit in the circuit and should be located as close to the source as possible.
"To prevent short circuits in the motor field windings."

Explanation

Question 42 of 150

1

A circuit protection device called a current limiter is essentially a slow-blow fuse and is designed to be used in

Select one of the following:

400 cycle AC circuits.
heavy power circuits.
starter-generator circuits.
Pass through conduit.

Explanation

Question 43 of 150

1

A CSD unit drives a generator through the use of

Select one of the following:

a synchronous electric motor.
an infinitely variable mechanical gearing system.
a variable hydraulic pump and hydraulic motor.
increase flux concentration.

Explanation

Question 44 of 150

1

A relay is

Select one of the following:

a magnetically operated switch.
a device which converts electrical energy to kinetic energy.
any conductor which receives electrical energy and passes it on with little or no resistance.
the frequency of alternating current.

Explanation

Question 45 of 150

1

A voltage regulator controls generator voltage by changing the

Select one of the following:

resistance in the generator output circuit.
current in the generator output circuit.
resistance of the generator field circuit.
"decreasing the output of the high generator to equal the output of the low generator."

Explanation

Question 46 of 150

1

Aircraft electrical junction boxes located in a fire zone are usually constructed of

Select one of the following:

asbestos.
cadmium-plated steel.
Iron steel copper
stainless steel.

Explanation

Question 47 of 150

1

Aircraft fuse capacity is rated in

Select one of the following:

volts.
ohms.
amperes.
Watts

Explanation

Question 48 of 150

1

Aircraft which operate only ac generators (alternators) as a primary source of electrical power normally provide current suitable for battery charging through the use of

Select one of the following:

a stepdown transformer and a rectifier.
an inverter and a voltage- dropping resistor.
a dynamotor with a half- wave dc output.
a variable resistor between the battery and generator.

Explanation

Question 49 of 150

1

Algunos motores eléctricos tienen dos juegos de embobinados de campo en direcciones opuestas de forma tal que

Select one of the following:

La velocidad del motor pueda ser controladas de más cerca.
La potencia de salida del motor pueda ser controlada de mas cerca.
El motor pueda ser operado en cualquier dirección.
Las revoluciones de salida del motor pueda ser controlada de mas cerca.

Explanation

Question 50 of 150

1

Bonding connections should be tested for

Select one of the following:

resistance value.
amperage value.
reactance.
Alternator

Explanation

Question 51 of 150

1

Certain transport aircraft use ac electrical power for all normal operation and battery furnished dc electrical power for standby emergency use. In aircraft of this type that operate no dc generators, the batteries are kept charged by

Select one of the following:

inverters which use the aircraft's ac generators as a source of power.
alternators which use the aircraft's generators as a source of power.
rectifiers which use the aircraft's ac generators as a source of power.
residual voltage.

Explanation

Question 52 of 150

1

Circuits that must be operated only in an emergency or whose inadvertent activation could endanger a system frequently employ

Select one of the following:

guarded switches.
push-pull-type circuit breakers only (no switches).
spring-loaded to off toggle or rocker switches.
only locknuts have been used for terminal attachment to the studs.

Explanation

Question 53 of 150

1

CSD driven generators are usually cooled by

Select one of the following:

oil spray.
an integral fan.
both ram air and an integral fan.
battery current to excite the field.

Explanation

Question 54 of 150

1

Cuál es la ventaja principal de un motor de corriente continua (direct current, DC) embobinado en serie?

Select one of the following:

Velocidad variable
Adecuado para uso a velocidad constante.
Baja torsión de arranque.
Alta torsión de arranque.

Explanation

Question 55 of 150

1

Cuál es una causa de que arqueen las brochas del generador?

Select one of the following:

"Asentar las brochas con papel de lija número 000.
"Partículas de polvo de carbón.
Poca tensión en los resortes.
Polvo y condiciones ambientales

Explanation

Question 56 of 150

1

Cuando dos o más generadores de corriente alterna se van a conectar en paralelo, se deben cumplir las siguientes condiciones antes de su conexión:

Select one of the following:

Igual corriente, igual frecuencia, igual fase e igual sincronismo
igual sincronismo, igual corriente, igual voltaje e igual frecuencia
Igual factor de potencia, igual fase, igual voltaje e igual frecuencia
Igual fase, igual voltaje, igual frecuencia e igual sincronismo

Explanation

Question 57 of 150

1

Cuando generadores de corriente alterna son operados en paralelo,

Select one of the following:

Los amperios y la frecuencia deben ser ambas iguales.
La frecuencia y el voltaje deben ser ambos iguales.
Los amperios y el voltaje deben ser ambos iguales.
Torsión baja de arranque.

Explanation

Question 58 of 150

1

Cuando la tensión de salida de un generador baja de un valor determinado (unos 107 voltios aproximadamente) se dice que el generador tiene bajo voltaje. El bajo voltaje puede tener su origen en:

Select one of the following:

Exceso de revoluciones de la C.S.D
Barra defectuosa
Exceso de revoluciones del motor
Batería descargada

Explanation

Question 59 of 150

1

During inspection of an anticollision light installation for condition and proper operation, it should be determined that

Select one of the following:

electrical or mechanical interconnections are provided so that the anticollision light will operate at all times that the position light switch is in the ON position.
an appropriately rated fuse is in position at the light to protect the connecting wiring against electrical faults.
the anticollision light can be operated independently of the position lights.
any conductor which receives electrical energy and passes it on with little or no resistance.

Explanation

Question 60 of 150

1

During inspection of the terminal strips of an aircraft electrical system, it should be determined that

Select one of the following:

only locknuts have been used for terminal attachment to the studs.
the terminal studs are anchored against rotation.
only plain nuts and lockwashers have been used for terminal attachment to the studs.
output voltage must be maintained at a constant value.

Explanation

Question 61 of 150

1

El APU posee como backup para encendido:

Select one of the following:

"Bateria y Bomba de Combustible de DC"
Bateria del Avion
HMG
IDG

Explanation

Question 62 of 150

1

El APU proporciona al avión:

Select one of the following:

Potencia Neumática
Potencia Eléctrica
Potencia Hidráulica
"Potencia Neumática y
Eléctrica"

Explanation

Question 63 of 150

1

El avión se puede alimentar eléctricamente externamente por medio de:

Select one of the following:

APU
GPU (Ground Power Unit)
Arrancador Neumatico.
Arrancador Eléctrico.

Explanation

Question 64 of 150

1

El control del correcto funcionamiento de la C.S.D. lo observamos en la cabina en los siguientes indicadores:

Select one of the following:

Frecuencimetro del generador asociado a la CSD, Luces indicadoras de CSD, Relé de la Barra de Alterna
Relé de la barra directa – Frecuencimetro del generador asociado a la CSD – Luces indicadoras de CSD
Termómetro de temperatura de aceite – Frecuencimetro del generador asociada con la CSD – Luces indicadoras de CSD
Frecuencimetro del generador asociado con la CSD – Luces indicadoras de CSD- Regulador de voltaje

Explanation

Question 65 of 150

1

El generador de corriente alterna del tipo sin escobillas no necesita ningún tipo de conexión eléctrica, entre la parte giratoria y no giratoria del mismo, debido a:

Select one of the following:

La ley de Lenz
La ley de Ampere
La ley de Faraday
La ley de Coulomb

Explanation

Question 66 of 150

1

El generador del Avion genera con una frecuencia de:

Select one of the following:

60hz
50hz
120hz
400hz

Explanation

Question 67 of 150

1

El reparto de la carga reactiva de cada generador es controlado por:

Select one of the following:

El relé del generador
El relé de la barra de enlace
El regulador de voltaje
El APU

Explanation

Question 68 of 150

1

El sistema eléctrico del avión permite utilizar la batería en tierra para:

Select one of the following:

Operar los sistemas utilitarios
Mantener la temperatura de cabina.
Mantener el sistema de combustible encendido siempre
Mantener la presión de la cabina.

Explanation

Question 69 of 150

1

Electric circuits are protected from overheating by means of

Select one of the following:

thermocouples.
shunts.
fuses.
cadmium-plated steel.

Explanation

Question 70 of 150

1

Electric wiring installed in aircraft without special enclosing means (open wiring) offers the advantages of ease of installation, simple maintenance, and reduced weight. When bundling open wiring, the bundles should

Select one of the following:

be limited as to the number of cables to minimize damage from a single electrical fault.
include at least one shielded cable to provide good bonding of the bundle to the airframe.
be limited to a minimum bend radius of five times the bundle diameter to avoid excessive stresses on the cable insulation.
Support the bundle to structure and/ or solid fluid lines to prevent chafing damage.

Explanation

Question 71 of 150

1

En el regulador de voltaje del sistema eléctrico utilizado normalmente en los generadores encontramos las siguientes partes:

Select one of the following:

P.M.G, circuito de detección, circuito amplificador, circuito de detección y detector de error
G.C.U, circuito de detección, circuito amplificador, circuito de detección y detector de error
Fuente de alimentación, G.C.U, circuito amplificador, circuito de detección y detector de error
Fuente de alimentación, circuito amplificador, circuito de detección y detector de error

Explanation

Question 72 of 150

1

Entre las componentes del inversor de tipo estático tenemos:

Select one of the following:

Filtro de armónicos, etapa de control, cilindro de control, retardo de encendido, excitador de potencia y red de filtro
Sensor de corriente, etapa de control, cilindro de control, retardo de encendido, excitador de potencia y red de filtro
Generador de onda cuadrada, etapa de control, conformador de pulsos, retardo de encendido, excitador de potencia y red de filtro
Filtro de armónicos, sensor de potencia, conformador de pulsos, retardo de encendido, etapa de control y red de filtro

Explanation

Question 73 of 150

1

Generalmente de las Barras de DC se conectan:

Select one of the following:

Sistemas básicos del avión
Sistemas esenciales y de emergencia
Sistemas poco importantes
Sistemas Obsoletos

Explanation

Question 74 of 150

1

Grounding is electrically connecting a conductive object to the primary structure. One purpose of grounding is to

Select one of the following:

prevent current return paths.
allow static charge accumulation.
prevent development of radio frequency potentials.
push-pull-type circuit breakers only (no switches).

Explanation

Question 75 of 150

1

How are generators rated?

Select one of the following:

Watts at rated voltage.
Amperes at rated voltage.
The impedance at rated voltage.
Current.

Explanation

Question 76 of 150

1

How can the direction of rotation of a dc electric motor be changed?

Select one of the following:

Interchange the wires which connect the motor to the external power source.
Reverse the electrical connections to either the field or armature windings.
Rotate the positive brush one commutator segment.
electrical or mechanical interconnections are provided so that the anticollision light will operate at all times that the position light switch is in the ON position.

Explanation

Question 77 of 150

1

How does the routing of coaxial cables differ from the routing of electrical wiring?

Select one of the following:

Coaxial cables are routed parallel with stringers or ribs.
Coaxial cables are routed at right angles to stringers or ribs.
Coaxial cables are routed as directly as possible.
Coaxial wires

Explanation

Question 78 of 150

1

How is a shunt-wound dc generator connected?

Select one of the following:

One field is shunted across the other.
Both fields are shunted across the armature.
The field and armature are shunted with a capacitor.
a synchronous electric motor.

Explanation

Question 79 of 150

1

How should a voltmeter be connected?

Select one of the following:

In series with the source.
In parallel with the load.
In series with the load.

Explanation

Question 80 of 150

1

If a wire is installed so that it comes in contact with some moving parts, what protection should be given the wire?

Select one of the following:

Wrap with soft wire solder into a shield.
Wrap with friction tape.
Pass through conduit.
wrapping with plastic.

Explanation

Question 81 of 150

1

If any one generator in a 24-volt dc system shows low voltage, the most likely cause is

Select one of the following:

an out-of-adjustment voltage regulator.
shorted or grounded wiring.
a defective reverse current cutout relay.
a stepdown transformer and a rectifier.

Explanation

Question 82 of 150

1

If it is necessary to use an electrical connector where it may be exposed to moisture, the mechanic should

Select one of the following:

coat the connector with grease.
use a special moisture- proof type.
spray the connector with varnish or zinc-chromate.
combined resistance and current-carrying capacity.

Explanation

Question 83 of 150

1

If one switch is used to control all navigation lights, the lights are most likely connected

Select one of the following:

in series with each other and parallel to the switch.
in series with each other and in series with the switch.
parallel to each other and in series with the switch.
parallel with the switch

Explanation

Question 84 of 150

1

If several long lengths of electrical cable are to be installed in rigid conduit, the possibility of damage to the cable as it is pulled through the conduit will be reduced by

Select one of the following:

dusting the cable with powdered graphite.
dusting the cable with powdered soapstone.
applying a light coat of dielectric grease.
prevent development of radio frequency potentials.

Explanation

Question 85 of 150

1

If the (+) terminal of a voltmeter is connected to the (-) terminal of the source voltage and the (-) terminal of the meter is connected to the (+) terminal of the source voltage, the voltmeter will read

Select one of the following:

correctly.
low voltage.
backwards.
parallel.

Explanation

Question 86 of 150

1

If the IDG scavenge oil filter is contaminated with chunks or pieces of metal

Select one of the following:

change the oil at 25 hour intervals.
"remove and replace the IDG."
"replace the oil and filter at 25 hour intervals."
oil spray.

Explanation

Question 87 of 150

1

If the positive field lead between a generator and a generator control panel breaks and is shorted while the engine is running, a voltmeter connected to generator output would indicate

Select one of the following:

zero voltage.
residual voltage.
normal voltage.
Hight voltage

Explanation

Question 88 of 150

1

In aircraft electrical systems, automatic reset circuit breakers

Select one of the following:

circuits each pole can complete through the switch.
are useful where only temporary overloads are normally encountered.
must be used in all circuits essential to safe operation of the aircraft.
should not be used as circuit protective devices.

Explanation

Question 89 of 150

1

In an ac circuit with no phase lead or lag, which is true?

Select one of the following:

Real power is zero.
Real power is greater than apparent power.
Real power equals apparent power.
Both fields are shunted across the armature.

Explanation

Question 90 of 150

1

In installations where the ammeter is in the generator or alternator lead, and the regulator system does not limit the maximum current that the generator or alternator can deliver, the ammeter can be redlined at what percent of the generator or alternator rating?

Select one of the following:

50
75
100
125

Explanation

Question 91 of 150

1

In the American Wire Gauge (AWG) system of numbers used to designate electrical wire sizes, the number assigned to a size is related to its

Select one of the following:

combined resistance and current-carrying capacity.
current-carrying capacity.
cross-sectional area.
should not be used as circuit protective devices.

Explanation

Question 92 of 150

1

In troubleshooting an electrical circuit, if an ohmmeter is properly connected across a circuit component and some value of resistance is read,

Select one of the following:

the component has continuity and is open.
either the component or the circuit is shorted.
the component has continuity and is not open.
circuit breaker activation.

Explanation

Question 93 of 150

1

Integrated drive generators (IDG) employ a type of high output ac generator that utilizes

Select one of the following:

"brushes and slip rings to carry generated dc exciter current to the rotating field.
"battery current to excite the field.
a brushless system to produce current.
either the component or the circuit is shorted.

Explanation

Question 94 of 150

1

La batería cumple como función

Select one of the following:

Suplir las necesidades básicas eléctricas del avión en caso de falla.
Mantener los motores encendidos
Mantener la Navegación del Avión
Poder encender los radios de VHF

Explanation

Question 95 of 150

1

La característica principal de un sistema eléctrico de corriente A.C. con generadores aislados es que:

Select one of the following:

El sistema solo funciona con A.C.
El voltaje de alterna solamente es de 115/200v a 400 CPS
La corriente de directa se obtiene únicamente a partir de inversores
No permite que corriente proveniente de dos o más fuentes distintas se mezclen en una sola baRRA

Explanation

Question 96 of 150

1

"La corriente AC en el avion se convierte en DC por medio de:"

Select one of the following:

Capacitores
"TRUs (Transformer Rectifier Units)"
Diodos
Densímetros

Explanation

Question 97 of 150

1

"La corriente DC del Avion se convierte a AC por medio de:"

Select one of the following:

"TRUS (Transformer Rectifier Unit)"
Diodos
Inversores
Capacitores

Explanation

Question 98 of 150

1

La corriente de arranque de un motor ambobinado en serie, al pasar a través de ambos embobinados, el del campo y el de la armadura, produce una

Select one of the following:

Torsión baja de arranque.
Velocidad un poco mayor cuando no tiene carga.
Torsión alta de arranque.
La frecuencia y el voltaje deben ser ambos iguales.

Explanation

Question 99 of 150

1

La misión principal del panel de control de barras es: El control del correcto funcionamiento de la C.S.D. lo observamos en la cabina en los siguientes indicadores:

Select one of the following:

Controlar el exceso de carga
Controlar el bajo voltaje
Controlar el relé del generador
Detección de barra sin corriente

Explanation

Question 100 of 150

1

La unidad hidráulica de la C.S.D encontramos:

Select one of the following:

Eje portador, unidad fija, unidad variable, cilindro de control, diferencial de engranajes y planetarios
Unidad hidráulica variable, unidad hidráulica fija, diferencial de engranajes y planetarios.
Unidad hidráulica variable, unidad hidráulica fija, eje portador de entrada y un cilindro de control
Unidad hidráulica variable, un sistema de gobierno de velocidad y un cilindro de control

Explanation

Question 101 of 150

1

Los aviones para atender sus demandas de energía eléctrica utilizan básicamente los siguientes tipos de corriente:

Select one of the following:

Corriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua a 28 voltios
Corriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua trifásica a 28 voltios a 400 c.p.s.
Corriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua monofásica a 28 voltios
Corriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua bifásica a 28 voltios

Explanation

Question 102 of 150

1

Los generadores del avión, generalmente se encuentran ubicados en:

Select one of the following:

Los motores
En el sistema Neumático
En el sistema hidráulico
En los alojamientos de los trenes de aterrizaje

Explanation

Question 103 of 150

1

Oil canning of the sides of aluminum or steel electrical junction boxes is considered to be

Select one of the following:

normal operation in vibration prone areas.
a shorting hazard.
acceptable operation.
Structural.

Explanation

Question 104 of 150

1

One advantage of using ac electrical power in aircraft is

Select one of the following:

that ac electrical motors can be reversed while dc motors cannot.
greater ease in stepping the voltage up or down.
"that the effective voltage is 1.41 times the maximum instantaneous voltage; therefore, less power input is required."
rectifiers which use the aircraft's ac generators as a source of power.

Explanation

Question 105 of 150

1

Para que el relé de salida del generador se cierre deben cumplirse dos condiciones:

Select one of the following:

"Que se ponga el interruptor correspondiente de cabina en ON y que lo permita el panel de control"
"Que se ponga el interruptor correspondiente de cabina en RESET y que lo permita el panel de control"
Que lo permita el panel de control y que el APU este disponible
Que lo permita el panel de control y que la EXTERNAL POWER este disponible

Explanation

Question 106 of 150

1

Residual voltage is a result of magnetism in the

Select one of the following:

field windings.
field shoes.
armature.
an integral fan.

Explanation

Question 107 of 150

1

Si un generador está equipado con un regulador de voltaje de tipo vibrador, el único momento en que los puntos del vibrador permenecen abiertos

Select one of the following:

La potencia de salida del motor pueda ser controlada de mas cerca.
Está controlado por la separación (clearance) de los puntos del relay de corte de corriente inversa.
Es aumentada cuando la carga externa es mayor que la salida del generador.
Depende en la carga que lleva el generador.

Explanation

Question 108 of 150

1

Terminales de alambre eléctrico para la mayoría de las aplicaciones de aeronaves deben ser del tipo

Select one of the following:

Ranurado.
Gancho.
Anillo.
Obturado

Explanation

Question 109 of 150

1

The circuit breaker in the instrument lighting system protects the

Select one of the following:

lights from too much current.
wiring from too much current.
inverters which use the aircraft's ac generators as a source of power.
wiring from too much voltage.

Explanation

Question 110 of 150

1

The generator rating is usually found stamped on the

Select one of the following:

firewall.
generator.
engine.
Energy

Explanation

Question 111 of 150

1

The inductor-type inverter output voltage is controlled by the

Select one of the following:

number of poles and the speed of the motor.
voltage regulator.
dc stator field current.
resistance of the generator field circuit.

Explanation

Question 112 of 150

1

The major advantages of alternating current (AC) over direct current (DC) is the fact that its current and voltage can easily be increased or decreased

Select one of the following:

by means of a inverter.
by means of a rectifier.
by means of a transformer.
be removed from the generator housing.

Explanation

Question 113 of 150

1

The most common method of attaching a pin or socket to an individual wire in an MS electrical connector is by

Select one of the following:

crimping.
soldering.
crimping and soldering.
Rolling

Explanation

Question 114 of 150

1

The most common method of regulating the voltage output of a compound dc generator is to vary the

Select one of the following:

current flowing through the shunt field coils.
total effective field strength by changing the reluctance of the magnetic circuit.
resistance of the series field circuit.
Rotate the positive brush one commutator segment.

Explanation

Question 115 of 150

1

The nominal rating of electrical switches refers to continuous

Select one of the following:

current rating with the contacts open.
voltage rating with the contacts closed.
current rating with the contacts closed.
the system voltage and cable length.

Explanation

Question 116 of 150

1

The overvoltage control automatically protects the generator system when excessive voltage is present by

Select one of the following:

opening the shunt field circuit.
opening and resetting the field control relay.
breaking a circuit to the trip coil of the field control relay.
increasing the output of the low generator to equal the output of the high generator.

Explanation

Question 117 of 150

1

The pin section of an AN/MS connector is normally installed on

Select one of the following:

the power supply side of a circuit.
the ground side of a circuit.
"either side of a circuit (makes no difference)."
resistance in the rotor windings.

Explanation

Question 118 of 150

1

The poles of a generator are laminated to

Select one of the following:

reduce flux losses.
increase flux concentration.
reduce eddy current losses.
an infinitely variable mechanical gearing system.

Explanation

Question 119 of 150

1

The primary considerations when selecting electric cable size are

Select one of the following:

current-carrying capacity and allowable voltage drop.
the voltage and amperage of the load it must carry.
the system voltage and cable length.
input voltage must be maintained at a constant value.

Explanation

Question 120 of 150

1

The purpose of a rectifier in an electrical system is to change

Select one of the following:

the frequency of alternating current.
direct current to alternating current.
alternating current to direct current.
Real power is zero.

Explanation

Question 121 of 150

1

The strength of the core of an electromagnet depends upon the material from which it is constructed and which of the following?

Select one of the following:

The number of turns of wire in the coil and the applied voltage.
The number of turns of wire in the coil and the amount of current (amperes) passing through the coil.
The size (cross section) and the number of turns of wire in the coil and the applied voltage.
resistance in the generator output circuit.

Explanation

Question 122 of 150

1

The three kinds of circuit-protection devices used most commonly in aircraft circuits are

Select one of the following:

circuit breakers, resistors, and current limiters.
circuit breakers, fuses, and current limiters.
circuit breakers, capacitors, and current limiter plug-ins mechanical reset types.
wrapping with electrical tape.

Explanation

Question 123 of 150

1

The voltage in an ac transformer secondary that contains twice as many loops as the primary will be

Select one of the following:

greater and the amperage less than in the primary.
"greater and the amperage greater than in the primary."
less and the amperage greater than in the primary.
by means of a rectifier.

Explanation

Question 124 of 150

1

The voltage output of an alternator may be regulated by controlling the

Select one of the following:

speed of the alternator.
voltage output of the dc exciter.
resistance in the rotor windings.
dusting the cable with powdered soapstone.

Explanation

Question 125 of 150

1

To help minimize radio interference a capacitor will largely eliminate and provide a steady direct current if the capacitor is connected to the generator in

Select one of the following:

parallel.
series.
series/parallel.

Explanation

Question 126 of 150

1

Un propósito de la puerta de inducidos (growler test) es para determinar la presencia de

Select one of the following:

Un conmutador con deformación circunferencial.
Un cable de campo roto.
Una armadura en corto.
Ranurado.

Explanation

Question 127 of 150

1

What is a method used for restoring generator field residual magnetism?

Select one of the following:

Flash the fields.
Reseat the brushes.
Energize the armature.
show very low resistance if it is a series field coil.

Explanation

Question 128 of 150

1

What is an important factor in selecting aircraft fuses?

Select one of the following:

The current exceeds a predetermined value.
The voltage rating should be lower than the maximum circuit voltage.
Capacity matches the needs of the circuit.
greater ease in stepping the voltage up or down.

Explanation

Question 129 of 150

1

What is normally used to bond noncontinuous stainless steel aircraft components?

Select one of the following:

Stainless steel jumpers.
Copper jumpers.
Aluminum jumpers.
Iron steel copper

Explanation

Question 130 of 150

1

What is the advantage of a circuit breaker when compared to a fuse?

Select one of the following:

Never needs replacing.
Always eliminates the need of a switch.
Resettable and reusable.
It breaks circuit quickly.

Explanation

Question 131 of 150

1

What is the advantage of a current limiter?

Select one of the following:

It breaks circuit quickly.
It can be reset easily.
It will take overload for a short period.
Always eliminates the need of a switch.

Explanation

Question 132 of 150

1

What is the frequency of an alternator dependent upon?

Select one of the following:

Voltage.
RPM.
Current.
Watts

Explanation

Question 133 of 150

1

What is the maximum amount of time a circuit can be in operation and still be an intermittent duty circuit?

Select one of the following:

Three minutes.
Two minutes.
One minute.
Ten minutes

Explanation

Question 134 of 150

1

What is the purpose of the selection of derated switches for known continuous load current applications?

Select one of the following:

To calculate the voltage drop across the circuit.
"To prevent short circuits in the motor field windings."
To obtain reasonable switch efficiency and service life.
The current exceeds a predetermined value.

Explanation

Question 135 of 150

1

What is the ratio of turns between the primary coil winding and the secondary coil winding of a transformer designed to triple its input voltage?

Select one of the following:

Primary will have one- third as many turns as its secondary.
Primary will have twice as many turns as its secondary.
Primary will have three times as many turns as its secondary.
Both fields are shunted across the armature.

Explanation

Question 136 of 150

1

"What is the voltage drop for a No. 18 copper wire 50 feet long to carry 12.5 amperes, continuous operation? Use the formula VD = RLA VD = Voltage drop R = Resistance per ft = .00644 L = Length of wire A = Amperes"

Select one of the following:

1/2V.
1V.
4V.
2V.

Explanation

Question 137 of 150

1

What kind of switch should you install in a single wire circuit that required the switch to be manually held in the ON position?

Select one of the following:

Single-pole, single-throw (SPST), two-position normally open (NO).
"Single-pole, single-throw (SPST), single-position."
Single-pole, double-throw (SPDT), single-position normally open (NO).
"Dual-pole, single-throw (DPST), single-position."

Explanation

Question 138 of 150

1

What protection to wires and cables does conduit provide when used in aircraft installations?

Select one of the following:

Electromagnetic.
Mechanical.
Structural.
Chemical

Explanation

Question 139 of 150

1

When adding a rheostat to a light circuit to control the light intensity, it should be connected in

Select one of the following:

parallel with the light.
series with the light.
series parallel with the light switch.
parallel with the switch

Explanation

Question 140 of 150

1

When considering an alteration, the criteria upon which the selection of electric cable size should be based are

Select one of the following:

applied voltage and allowable voltage drop.
current-carrying capacity and allowable voltage drop.
current-carrying capacity and applied voltage.
The current exceeds a predetermined value.

Explanation

Question 141 of 150

1

When dc generators are operated in parallel to supply power for a single load, their controls include an equalizer circuit to assure that all generators share the load equally. The equalizer circuit operates by

Select one of the following:

increasing the output of the low generator to equal the output of the high generator.
"decreasing the output of the high generator to equal the output of the low generator."
increasing the output of the low generator and decreasing the output of the high generator until they are equal.
total effective field strength by changing the reluctance of the magnetic circuit.

Explanation

Question 142 of 150

1

"When necessary during operation, CSD disconnect is usually accomplished by"

Select one of the following:

a switch in the cockpit.
circuit breaker activation.
a shear section in the input shaft.
the component has continuity and is not open.

Explanation

Question 143 of 150

1

When using an ohmmeter to check the continuity of a generator field coil, the coil should

Select one of the following:

be removed from the generator housing.
show high resistance when the meter prods are connected to the terminals of the coil.
show very low resistance if it is a series field coil.
opening the shunt field circuit.

Explanation

Question 144 of 150

1

When using the voltage drop method of checking circuit resistance, the

Select one of the following:

input voltage must be maintained at a constant value.
output voltage must be maintained at a constant value.
input voltage must be varied.
the voltage and amperage of the load it must carry.

Explanation

Question 145 of 150

1

Where electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., the wires should be protected from chafing by

Select one of the following:

wrapping with electrical tape.
using a suitable grommet.
wrapping with plastic.
wiring from too much voltage.

Explanation

Question 146 of 150

1

Which of the following copper electrical cable sizes should be selected to replace a No. 6 aluminum electrical cable?

Select one of the following:

No. 4.
No. 6.
No. 8.
No. 10.

Explanation

Question 147 of 150

1

Which of the following must be accomplished when installing an anticollision light?

Select one of the following:

Install a switch independent of the position light switch.
Use shielded electrical cable to assure fail-safe operation.
Connect the anticollision light to the aircraft position light switch.
The number of turns of wire in the coil and the applied voltage.

Explanation

Question 148 of 150

1

Which of the following should be accomplished in the installation of aircraft wiring?

Select one of the following:

Support the bundle to structure and/ or solid fluid lines to prevent chafing damage.
Provide adequate slack in the wire bundle to compensate for large changes in temperature.
Locate the bundle above flammable fluid lines and securely clamp to structure.
only plain nuts and lockwashers have been used for terminal attachment to the studs.

Explanation

Question 149 of 150

1

Which statement relating to electric wiring is true?

Select one of the following:

When attaching a terminal to the end of an electric cable, it should be determined that the strength of the cable-to- terminal joint is at least twice the tensile strength of the cable.
electrical unit in the circuit and should be located as close to the source as possible.
"All electric cable splices should be covered with soft insulating tubing (spaghetti) for mechanical
protection against external abrasion."
When attaching a terminal to the end of an electric cable, it should be determined that the strength of the cable-to- terminal joint is at least equal to the tensile strength of the cable itself.

	Created by DIEGO FERNANDO HERNANDEZ CORTAZAR about 8 years ago

SIMULADOR EXAMEN DE LICENCIA TLA PARA COLOMBIA SISTEMAS ELECTRICOS

SIMULADOR 5 EXAMEN LICENCIA TLA SOLO SISTEMAS ELECTRICOS (INGLES)

Question 1 of 150

A series-wound dc electric motor will normally require

Select one of the following:

Explanation

Question 2 of 150

A voltage regulator controls generator output by

Select one of the following:

Explanation

Question 3 of 150

Aluminum wire must be stripped very carefully because

Select one of the following:

Explanation

Question 4 of 150

An ammeter in a battery charging system is for the purpose of indicating the

Select one of the following:

Explanation

Question 5 of 150

For general electrical use in aircraft, the acceptable method of attaching a terminal to a wire is by

Select one of the following:

Explanation

Question 6 of 150

How can it be determined if a transformer winding has some of its turns shorted together?

Select one of the following:

Explanation

Question 7 of 150

How does the magnetic brake used to stop rotation of an electric motor armature operate?

Select one of the following:

Explanation

Question 8 of 150

"How many cycles of ac voltage are produced in a six-pole alternator of the revolving-field type for each revolution of the rotor?"

Select one of the following:

Explanation

Question 9 of 150

If a generator is equipped with a vibrator-type voltage regulator, the actual time the voltage regulator points remain open

Select one of the following:

Explanation

Question 10 of 150

"If the reverse current cutout relay contact points fail to open after the generator output has dropped below battery potential, current will flow through the generator armature"

Select one of the following:

Explanation

Question 11 of 150

One purpose of a growler test is to determine the presence of

Select one of the following:

Explanation

Question 12 of 150

The commutator of a generator

Select one of the following:

Explanation

Question 13 of 150

The method most often used in overcoming the effect of armature reaction is through the use of

Select one of the following:

Explanation

Question 14 of 150

The only practical method of maintaining a constant voltage output from an aircraft generator under varying conditions of speed and load is to vary the

Select one of the following:

Explanation

Question 15 of 150

The pole pieces or shoes used in a dc generator are a part of the

Select one of the following:

Explanation

Question 16 of 150

The starting current of a series-wound dc motor, in passing through both the field and armature windings, produces a

Select one of the following:

Explanation

Question 17 of 150

The type of electric wire terminals used for most aircraft applications, in addition to providing good current carrying capabilities, are designed primarily

Select one of the following:

Explanation

Question 18 of 150

To test generator or motor armature windings for opens,

Select one of the following:

Explanation

Question 19 of 150

To what depth is the mica insulation between the commutator bars of a dc generator undercut?

Select one of the following:

Explanation

Question 20 of 150

What is a cause of generator brush arcing?

"How many cycles of ac voltage are produced in a six-pole alternator of the revolving-field type
for each revolution of the rotor?"